I've been looking to buy waves with BTC but all the websites i've found so far have mixed reviews so i'm not sure if i should use them..
Please let me know what website you use for buying and selling altcoins
If waves is the one you want to buy then bittrex is a good choice to try I already do it multiple times and transfer it to my waves wallet and I don't have any bad experience using that exchange.
I agree, if you wanted to buy altcoins now. Bittrex would be a good website to choose from. Same as the above mentioned, and you could transfer it to your waves wallet, its easier and doesn't have problems when withdrawing your altcoins unlike Poloniex which are having issues lately withdrawing altcoins. That's just my opinion though.